Structural formula of lycopene has to be drawn showing the two sets of four isoprene units linked to form lycopene. Concept Introduction: Terpenes are made by joining five-carbon units, usually in a head to tail-fashion. Isoprene unit: Branched end of isoprene – Head Unbranched end of isoprene - Tail

Question

(f) SO: Best Lewis Structure 3 e group geometry:_ shape/molecular geometry:, (g) CF2CF2 Best Lewis Structure polarity: e group arrangement:_ shape/molecular geometry: (h) (NH4)2SO4 Best Lewis Structure polarity: e group arrangement: shape/molecular geometry: polarity: Sketch (with angles): Sketch (with angles): Sketch (with angles):

Answer 1

Question

Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 5, Problem 5.30P

(a)

Interpretation Introduction

Interpretation:

Structural formula of lycopene has to be drawn showing the two sets of four isoprene units linked to form lycopene.

Concept Introduction:

Terpenes are made by joining five-carbon units, usually in a head to tail-fashion.

Isoprene unit:

Branched end of isoprene – Head

Unbranched end of isoprene - Tail

(b)

Interpretation Introduction

Interpretation:

Number of double in lycopene that has a possibility of cis, trans isomerism has to be given and the double bond that shows cis and that shows trans isomers has to be identified.

Concept Introduction:

Terpenes are made by joining five-carbon units, usually in a head to tail-fashion.

Isoprene unit:

Branched end of isoprene – Head

Unbranched end of isoprene - Tail

Alkene: Unsaturated hydrocarbons having at least one double bond between two carbon atoms are known as alkenes.

• Trans configuration: In trans configuration, carbon atoms present in the main chain are placed on opposite sides of the carbon-carbon double bond.

• Cis configuration: In cis configuration, carbon atoms present in the main chain are placed on same sides of the carbon-carbon double bond.

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(f) SO: Best Lewis Structure 3 e group geometry:_ shape/molecular geometry:, (g) CF2CF2 Best Lewis Structure polarity: e group arrangement:_ shape/molecular geometry: (h) (NH4)2SO4 Best Lewis Structure polarity: e group arrangement: shape/molecular geometry: polarity: Sketch (with angles): Sketch (with angles): Sketch (with angles):

1. Problem Set 3b Chem 141 For each of the following compounds draw the BEST Lewis Structure then sketch the molecule (showing bond angles). Identify (i) electron group geometry (ii) shape around EACH central atom (iii) whether the molecule is polar or non-polar (iv) (a) SeF4 Best Lewis Structure e group arrangement:_ shape/molecular geometry: polarity: (b) AsOBr3 Best Lewis Structure e group arrangement:_ shape/molecular geometry: polarity: Sketch (with angles): Sketch (with angles):

(c) SOCI Best Lewis Structure 2 e group arrangement: shape/molecular geometry:_ (d) PCls Best Lewis Structure polarity: e group geometry:_ shape/molecular geometry:_ (e) Ba(BrO2): Best Lewis Structure polarity: e group arrangement: shape/molecular geometry: polarity: Sketch (with angles): Sketch (with angles): Sketch (with angles):

Answer 2

Question

Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 5, Problem 5.30P

(a)

Interpretation Introduction

Interpretation:

Structural formula of lycopene has to be drawn showing the two sets of four isoprene units linked to form lycopene.

Concept Introduction:

Terpenes are made by joining five-carbon units, usually in a head to tail-fashion.

Isoprene unit:

Branched end of isoprene – Head

Unbranched end of isoprene - Tail

(b)

Interpretation Introduction

Interpretation:

Number of double in lycopene that has a possibility of cis, trans isomerism has to be given and the double bond that shows cis and that shows trans isomers has to be identified.

Concept Introduction:

Terpenes are made by joining five-carbon units, usually in a head to tail-fashion.

Isoprene unit:

Branched end of isoprene – Head

Unbranched end of isoprene - Tail

Alkene: Unsaturated hydrocarbons having at least one double bond between two carbon atoms are known as alkenes.

• Trans configuration: In trans configuration, carbon atoms present in the main chain are placed on opposite sides of the carbon-carbon double bond.

• Cis configuration: In cis configuration, carbon atoms present in the main chain are placed on same sides of the carbon-carbon double bond.

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Answer 3

Question

Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 5, Problem 5.30P

(a)

Interpretation Introduction

Interpretation:

Structural formula of lycopene has to be drawn showing the two sets of four isoprene units linked to form lycopene.

Concept Introduction:

Terpenes are made by joining five-carbon units, usually in a head to tail-fashion.

Isoprene unit:

Branched end of isoprene – Head

Unbranched end of isoprene - Tail

(b)

Interpretation Introduction

Interpretation:

Number of double in lycopene that has a possibility of cis, trans isomerism has to be given and the double bond that shows cis and that shows trans isomers has to be identified.

Concept Introduction:

Terpenes are made by joining five-carbon units, usually in a head to tail-fashion.

Isoprene unit:

Branched end of isoprene – Head

Unbranched end of isoprene - Tail

Alkene: Unsaturated hydrocarbons having at least one double bond between two carbon atoms are known as alkenes.

• Trans configuration: In trans configuration, carbon atoms present in the main chain are placed on opposite sides of the carbon-carbon double bond.

• Cis configuration: In cis configuration, carbon atoms present in the main chain are placed on same sides of the carbon-carbon double bond.

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Answer 4

Question

Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 5, Problem 5.30P

(a)

Interpretation Introduction